Reweighting Lefschetz Thimbles

Reweighting Lefschetz Thimbles
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DOI:
10.21468/scipostphys.5.5.044
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发表时间:
2018-03
期刊:
Proceedings of The 36th Annual International Symposium on Lattice Field Theory — PoS(LATTICE2018)
影响因子:
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通讯作者:
Stefan Blücher;J. Pawlowski;M. Scherzer;Mike Schlosser;I. Stamatescu;Sebastian Syrkowski;Felix Ziegler
Stefan Blücher;J. Pawlowski;M. Scherzer;Mike Schlosser;I. Stamatescu;Sebastian Syrkowski;Felix Ziegler
中科院分区:
其他
文献类型:
--
作者:
Stefan Blücher;J. Pawlowski;M. Scherzer;Mike Schlosser;I. Stamatescu;Sebastian Syrkowski;Felix Ziegler

文献摘要

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相似文献

Lefschetz 顶针模拟的主要挑战之一是计算贡献顶针的相对重量。在本文中,我们提出了通过使用重新加权过程计算这些权重来解决该问题的方法。此外,我们还提出了寻找给定理论的顶针和反顶针参数化的方法。此外,我们研究了一些将 Lefschetz 顶针方法与复杂朗之万演化相结合的方法。我们的数值研究是通过使用玩具模型进行的,其中我们考虑单点 z^4 模型以及 U(1) 单链接模型。
One of the main challenges in simulations on Lefschetz thimbles is the computation of the relative weights of contributing thimbles. In this paper we propose a solution to that problem by means of computing those weights using a reweighting procedure. Besides we present recipes for finding parametrizations of thimbles and anti-thimbles for a given theory. Moreover, we study some approaches to combine the Lefschetz thimble method with the Complex Langevin evolution. Our numerical investigations are carried out by using toy models among which we consider a one-site z^4 model as well as a U(1) one-link model.